Microsoft MS-DOS 1.25 [Hyperion]
Released in 1983 by Microsoft/Dynalogic Info-Tech Corporation
For Hyperion computers

This version of DOS is specifically for the Dynalogic/Bytec Hyperion
portable computer. It will not run on other computers. The Hyperion
was somewhat, but not entirely, IBM PC compatible and competed
against the Compaq Portable.

Archive contains two 5.25" 320k floppy disk images in Imagedisk
format.

Important: This software will only run on a Hyperion computer. It 
will not run on an IBM PC or IBM PC emulator.

Important: These disks are formatted for DOS 1.x and can not be 
opened in tools like WinImage.